To find the lane section I did a Craigslist search for bowling lanes and happened to find a guy about 50 miles away from me that was selling lane sections that he procured during a demolition job he was hired for. I paid about $300 for an 8 foot section with the arrow inlays. The section was about 2.5" thick and weighed about 250 pounds.
I've included a .dxf file of the wooden leg parts in this Instructable so that anyone can build one if they'd like.
Step 1: Preparing the lane
Using a hand router and a piece of metal to serve as a guide I routed out three pockets across the width of the table. I made the pockets 3/4" wide to accommodate the 5/8" aluminum square stock and made sure to make them a little deeper than necessary because I needed to sand the bottom down and didn't want the belt of the sander to touch the metal pieces.
With the pockets routed, I set out drilling out the aluminum bar stock. I spaced the holes so that each was on center with piece of maple. The goal was to tie all of the pieces of maple together using the bar so that the table won't sag in the future. When this was done I ran screws through each hole and into the bottom of the table.
This resulted in a sturdy top that shouldn't sag.